How to Change Your Wi-Fi Channel (And Improve Performance)
Linksys Official Support - The two types of dual-band routers
How to configure my basic wireless setting on TL-Link dual band wireless router | TP-Link
For use with mobile, is 2.4 GHz (B+G+N) the right band setting for my wireless router? - Super User
Amazon.com: AX3000 WiFi 6 Router, Household Dual Band Gigabit Wireless Internet Router, Support OFDMA, MU-MIMO, WPA3 Security, Long Range Coverage : Electronics